I realize this is new post to an old post, but when you are looking for solutions, it would be nice to see one that works simply.

I believe the simple solution to this problem is the stored procedure called:

sp_rename

to quickly rename a file with script do the following:

sp_rename [ @objname = ] 'object_name' , [ @newname = ] 'new_name'
[ , [ @objtype = ] 'object_type' ] ...